Your Answer is C (25,25).
On the second tringle there is x+20
On the first there is 5x
This means the second triangle is 5+20=25
So both are 25
Hope this helps!
Step-by-step explanation:
Recall the identity

We can see that

The ratio ...
... seniors : juniors = 3 : 2
can be multiplied by 7 to get
... = 21 : 14
indicating there are 14 juniors for the 21 seniors in the choir.